fix COSMOS

[aliel]

No description provided.

[github-actions]

The changes in this PR introduce several new features and modifications to existing logic, which could potentially introduce bugs or require deep understanding of the project architecture. Here are some of the key changes and their potential impact:

1. New Chain Support: The addition of the CSDK chain support involves changes to multiple files, including the main SDK logic and specific chain-related files. This includes:

   • Adding the CSDKAccount class and related methods.
   • Modifying existing chain handling logic to include the new CSDK chain.
   • Introducing new dependencies and changes to the verification process.

2. Verification Logic: The changes to the verification logic are significant and include:

   • Modifying the way public keys and signatures are handled and encoded/decoded.
   • Adding new methods for verifying signatures, which could affect the overall security and integrity of the system.
   • Introducing exceptions for invalid signatures, which indicates a higher risk of bugs or security vulnerabilities.

3. Tests: The addition of new tests is a positive step, but the complexity of the changes requires comprehensive testing to ensure reliability. The new tests cover various aspects of the new chain support and verification logic, which is crucial for maintaining the quality of the codebase.

Considering the potential impact on the codebase and the need for deep understanding of the project architecture, this PR should be reviewed by experienced developers with extensive knowledge of the Aleph.im network and its underlying technologies. The 'BLACK' label is appropriate for this PR, indicating a high level of complexity and potential risk.